Load Backup power amount - Deye sun-6k-sg03lp1-eu

[gzuliani]

Hi,

I developed a custom monitoring system for my Deye inverter. Yesterday, for the first time, I tested the Backup Load connection, attaching a 1kW heater. After some time, a new icon appeared on the Deye Cloud app, named "UPS":

None of the registers I was polling was set to (or near to) the 1kW power value. In particular, registers #174 "Inverter L2 power" and #177 "Load L2 power", the ones I suspected were associated to the "Backup Load" connection, were always zero. I started peeking all other power-related register, i. e. #166 "Micro inverter power", but no one was showing the expected value.

So I started reading all the read-only registers in the range 150-195, and found that there was one whose value was almost zero when the heater was switched off, and around 1000 when the heater was on. The problem is that such register was #185, i.e. "Battery status", as per specs V118:

Is it possible that the name for the register #185 is wrong and it actually contains the value of the power transferred to the Backup Load? Has anyone already done any experiments on the subject?

Best regards,
Gianfranco